From a gameplay standpoint, I really like the concept, from a practicality standpoint though, there are two main problems that others have already pointed out:
- Tall stacks blocking spectator and refs visibility
- Stacks falling out of the field
The second problem could be solved in a few different ways; cables or nets running the length of the field (think 2013) could be used to alleviate the problem; backing refs away from the field would help a bit too.
The first problem is the biggest one though. I don't see a practical way to prevent view obstruction with this arrangement.
The other thought I would pose is that with this arrangement, you have robots from one alliance focusing on one side of the field, but its on one long side instead of a short side as is normal. Imo, it would be ideal if there was a way to split the scoring platforms so all the red zones are on one end of the field and blue on the other. Potentially you could divide these areas using single step segments but I'm not sure how feasible this would be.